Digital watermarking technology is a common scheme to secure the copyright of digital vector map.
数字矢量地图水印技术是一种解决数字矢量地图版权保护问题的常用手段。
Digital vector map has great economical value and strategy significance for its accurate content.
数字矢量地图的地理信息详实准确，具有巨大的经济价值和战略意义。
Based on the difference expansion and difference shifting, a novel reversible watermarking algorithm for digital vector map is proposed.
利用差分平移和差分扩张，提出一种新的应用于数字矢量地图的可逆水印算法。
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